Ethyl 5H-pyrimido[4,5-b][1,4]thiazine-6-carboxylate CAS 69785-97-3
| CAS No. | 69785-97-3 |
| Molecular Formula | C9H9N3O2S |
| Molecular Weight | 223.25 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C9H9N3O2S, Ethyl 5H-pyrimido[4,5-b][1,4]thiazine-6-carboxylate contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 223.25 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
Ethyl 5H-pyrimido[4,5-b][1,4]thiazine-6-carboxylate (CAS 69785-97-3) is a high-purity analytical reference standard with the molecular formula C9H9N3O2S and a molecular weight of 223.25 g/mol.
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
As a certified reference material (CRM), Ethyl 5H-pyrimido[4,5-b][1,4]thiazine-6-carboxylate meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C9H9N3O2S |
| Molecular Weight | 223.25 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1976 |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Recommended Standards
- Ethyl 5-Aminothieno[2,3-d]pyrimidine-6-carboxylate (CAS 59488-80-1)
- Ethyl 5-imino-5H-thiazolo[3,2-a]pyrimidine-6-carboxylate (CAS 51992-01-9)
- Ethyl 4-hydroxythieno[2,3-b]pyridine-5-carboxylate (CAS 55503-31-6)
- Ethyl 6-hydroxybenzo[d]thiazole-2-carboxylate (CAS 59587-30-3)
- (R)-1-(2-chloro-7-fluoroquinolin-3-yl)ethan-1-ol (CAS 1065483-17-1)
- 1-(4-Bromophenyl)ethylamine (CAS 24358-62-1)
- N-cycloheptyl-4-(cyclopropanecarbonyl)-1H-pyrrole-2-carboxamide (CAS 860610-18-0)
- Methyl 2-amino-4-isobutylthiophene-3-carboxylate (CAS 183562-37-0)
- Methyl 4-methyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)thiophene-2-carboxylate (CAS 1227664-25-6)
- 5-(2-Methylprop-1-en-1-yl)pyrimidine (CAS 71418-86-5)
- (S)-Tolvaptan (CAS 331947-44-5)
- N-Isopropylpyrimidin-2-amine (CAS 4214-72-6)
- Acetic acid, 2-(4-bromo-2-chloro-6-cyanophenoxy)-, ethyl ester (CAS 1956356-17-4)
- Semaglutide Impurity 161 (x TFA Salt) (CAS CATO-C4X-2226161)
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